JP2024505677A - side milling cutter - Google Patents

Abstract

The side milling cutter (100) has a body extending from a first end (11) along a predetermined axis of rotation (R) and having an interface for rotational drive connection to a free second end (12). (10), on which a seat (14) for the disc-shaped cutter holder (20) is constructed, fixed to the second end (12) and facing the main body (10). A central through opening (23) is supported on the main surface (21), and on the seat surface (14), the outer periphery projects radially from the main body (10) and passes axially through the disc-shaped cutter holder (20). A disc-shaped cutter holder (20) is provided. A plurality of coolant supply channels (60) are configured within the body (10) for delivering coolant to the second end (12) of the body (10). A plurality of coolant distribution channels (50) are formed in the disc-shaped cutter holder (20) for supplying coolant to the outer periphery of the cutter holder (20).

Description

The invention extends along a predetermined axis of rotation from a first end having an interface for coupling to a rotary drive to a free second end, which is configured with a seating surface for a disc-shaped cutter holder. and a disc-shaped cutter holder fastened to a second end.

Side milling cutters, which are often used to cut grooves or slits in workpieces and primarily to cut metal materials, include a disc-shaped cutter holder in a body configured to be coupled to a rotary drive. is arranged, and a plurality of cutters are distributed on its circumference. In this case, the cutter can in particular be formed by cutter inserts, which are held in corresponding seats of the cutter holder and are typically made of a harder and more wear-resistant material than the body and the disc-shaped cutter holder. formed from. For example, the body and disc-shaped cutter holder can be formed from tool steel, and the cutter can be formed from a hard metal, cermet, ceramic or an ultra-hard material, such as for example PCD (polycrystalline diamond) or CBN (cubic boron nitride). can do.

Patent Document 1 describes a side milling cutter that includes a main body and a disc-shaped cutter holder fixed to the main body. A plurality of coolant supply channels are formed in the body, each leading to an elongated end coolant distribution chamber through which coolant is distributed to each of the disc-shaped cutter holders. transferred to multiple inlet openings.

German utility model specification No. 202017105606

The object of the invention is to provide an improved side milling cutter with improved coolant supply to the cutter and with increased design freedom in connection with the configuration of the disc-shaped cutter holder.

When the terms axial, radial or tangential are used in the following description, these terms shall be associated with the axis of rotation of the respective side milling cutter, unless the specific context dictates otherwise. do.

This object is achieved by a side milling cutter according to claim 1 . Advantageous embodiments are described in the dependent claims.

The side milling cutter has a seating surface for a disc-shaped cutter holder extending along a predetermined axis of rotation from a first end provided with an interface for connection to a rotary drive toward a free second end. a disk having a central through-opening which is fastened to the second end and is supported by the seating surface with the first principal surface facing the main body and whose outer periphery protrudes radially from the main body and extends through the main body in the axial direction; It has a shaped cutter holder. A plurality of coolant supply channels are formed in the body for supplying coolant to the second end of the body. The disc-shaped cutter holder is formed with a plurality of coolant distribution channels for supplying coolant to the outer periphery of the cutter holder. At least two of the plurality of coolant distribution channels diverge from a common coolant distribution chamber, the distribution chamber being formed between the body and the disc-shaped cutter holder, and at least two of the plurality of coolant supply channels branching from a common coolant distribution chamber. It opens into the chamber.

A common coolant distribution chamber is provided in which at least two of the plurality of coolant supply channels are open, so that the coolant can be supplied even if, for example, the coolant supply channels become clogged with contaminants. It is possible to reliably supply the material to the outer circumference of the cutter holder. A central through-opening is provided that passes axially through the disc-shaped cutter holder, so that the side milling cutter can be designed as a bayonet-type side milling cutter, which side milling cutter can be cut from the free second end. It can be fastened by means of a central clamping screw to a rotary drive, to which a side milling cutter is connected via an interface configured at the first end. All coolant supply channels of the plurality of coolant supply channels may open into one common coolant distribution chamber, and all coolant distribution channels of the cutter holder may diverge from one common coolant distribution chamber. Therefore, it is advantageous.

According to another embodiment, the common coolant distribution chamber extends annularly about the axis of rotation. In this case, a particularly homogeneous distribution of the coolant into all coolant distribution channels is achieved.

According to another embodiment, the coolant distribution channels are each a first channel portion running inside the cutter holder, a side surface of the first major surface of the cutter holder and a second channel portion opposite this first major surface. with at least one exit opening on the outer periphery of the cutter holder and facing the first main face of the cutter holder; and an inlet opening towards the first main surface and extending over only part of the thickness of the cutter holder in the area of the through opening. In this case, a relatively large cross section can be provided through the inlet for transporting the coolant into the disc-shaped cutter holder, so that the flow resistance can be kept low.

According to another embodiment, the coolant distribution channels each have a connection connecting the inlet part to the first channel part, the connection being closed in the direction of the through opening and with respect to the second main surface. It is said to be composed of Since the connection is provided, the axial height of the inlet opening towards the through-opening can be selected to be only a relatively small fraction of the axial length of the through-opening, and thus The remainder of the axial length of the through opening is available for sealing against unwanted coolant leakage.

If the axial height of the inlet opening towards the through opening is at most one third of the thickness of the disc-shaped cutter holder at the through opening, the remainder of the axial height of the through opening; can be reliably sealed against unwanted coolant leakage through most of the The thickness of the cutter holder at the through-opening can correspond, for example, to the thickness of the cutter holder in the seat area of the cutter insert. In particular, if the cutter holder has a stepped configuration in the area of the through-opening, as a result of which the area of the first main surface supported on the seat surface is configured as a projection or as a recess, the through-opening The thickness of the cutter holder at the periphery will be different from the thickness of the cutter holder at its outer circumference.

According to another embodiment, the coolant distribution chamber is formed by a recess in the disc-shaped cutter holder adjacent the first major surface and the through opening and extending between the inlet parts of each coolant distribution channel. It has a part on the cutter holder side. In this case, a uniform distribution of the coolant over the circumference of the cutter holder is achieved, and overall a large flow cross section for the inflow of the coolant into the coolant distribution channels can be provided.

If the axial height of the coolant distribution chamber on the cutter holder side is at most one third of the thickness of the disc-shaped cutter holder at the through opening, then the axial height of the through opening is in the circumferential area. This is sufficient to ensure that undesired coolant leakage is reliably sealed even in the circumferential region where the recess is formed in the cutter holder part of the coolant distribution chamber.

Preferably, the axial height of the cutter holder side part of the coolant distribution chamber, i.e. the axial height of the recess, can approximately correspond to the axial height of the inlet section, opening towards the through opening. Preferably, it corresponds approximately to the axial height of the material distribution channel.

According to another embodiment, a centering pin projecting axially from the seat surface is formed at the second end of the body, and the through opening of the cutter holder is adapted to the outer contour of the centering pin. In this case, the interaction between the through opening and the outer contour of the centering pin makes it possible to reliably prevent unwanted leakage of coolant.

According to another embodiment, a through hole which is open at the second end extends through the centering pin. In this case, the fixing of the side milling cutter to the rotary drive mechanism can be simply carried out by accessing the through hole starting from the second end. Engagement into the through-hole can be effected, for example, by means of a screw-in tool.

The inner circumferential surface of the through opening of the cutter holder preferably seals against the outer circumferential surface of the centering pin. In this case, undesired coolant leakage can be reliably prevented. The inner circumferential surface of the through-opening and the outer circumferential surface of the centering pin can be polished, for example, to enable a sealing fit. It is preferable that the inner circumferential surface of the through opening and the outer circumferential surface of the centering pin are rotationally symmetrical about the rotation axis. The outer circumferential surface of the centering pin and the inner circumferential surface of the through opening can be, for example, conical in shape, the inner circumferential surface preferably being hollow cylindrical, but the outer circumferential surface correspondingly being cylindrical. This is because it enables particularly simple and inexpensive manufacturing.

According to another embodiment, the plurality of coolant supply channels open radially into a common coolant distribution chamber outside the centering pin. In this case, the common coolant distribution chamber can be constructed particularly simply and inexpensively, so that flow resistance is minimized and the coolant is reliably and evenly distributed over the entire circumference.

According to another embodiment, the coolant distribution chamber has a first body side, which side has a groove running around the centering pin and deepening relative to the seating surface. are doing. In this case, a sufficient cross section of the coolant distribution chamber can be provided in a particularly simple and inexpensive manner, and a uniform distribution of the coolant is achieved over the entire circumference of the centering pin.

According to another embodiment, the coolant distribution chamber has a second body side formed through a circumferential recess formed in the centering pin. In this case, the cross section of the coolant distribution chamber can be enlarged in a particularly simple manner, so that the flow resistance can be kept low. Preferably, the recess is formed in a region between the seal outer peripheral surface and the seat surface of the centering pin for the disc-shaped cutter holder.

According to another embodiment, the cutter holder has a plurality of seats distributed over the circumference of the disc-shaped cutter holder for receiving replaceable cutter inserts. In this case, the cutter holder can be produced inexpensively, for example from tool steel, and only the cutter insert with the cutter in contact with the workpiece to be machined is made of particularly hard material, for example of carbide (cemented carbide). Must be made of wear-resistant material.

According to another embodiment, the seat is configured to receive replaceable cutter inserts, each projecting axially on opposite sides from the disc-shaped cutter holder. In this case relatively narrow slits can also be constructed via side milling cutters and/or the material can be cut with a relatively small slit width.

If the side milling cutter has a plurality of replaceable cutter inserts fixed to the seat and forming that area of the side milling cutter that projects most axially from the body, the groove is also e.g. very close to the bottom of the recess. It can also be arranged in a recess.

Further advantages and expedients of the invention will become apparent on the basis of the following description of an exemplary embodiment with reference to the accompanying drawings, in which: FIG.

1 is a schematic perspective view of a side milling cutter according to one embodiment; FIG. 2 is a perspective view of a side milling cutter corresponding to FIG. 1 with a number of replaceable cutter inserts mounted on each seat; FIG. 3 is a schematic perspective view of the side milling cutter of FIG. 2; FIG. FIG. 4 is a plan view of the free second end of the body of this embodiment. 5 is a sectional view taken along line CC in FIG. 4. FIG. 6 is a detailed enlarged view of D in FIG. 5. FIG. FIG. 3 is a schematic perspective view of the lower surface of a disc-shaped cutter holder with a cutter insert arranged therein. FIG. 2 is a schematic perspective view of a disc-shaped cutter holder with hidden dashed lines. FIG. 3 is a schematic perspective view of the lower side of the cutter holder with hidden lines using dashed lines. 10 is a detailed enlarged view of E marked with a circle in FIG. 9; FIG. FIG. 3 is a schematic diagram of a cutter holder with hidden lines using dashed lines; 12 is a cross-sectional view taken along line DD in FIG. 11. FIG. FIG. 3 is a schematic plan view of the side milling cutter with dashed lines and in the direction of the free second end; 14 is a sectional view taken along line FF in FIG. 13. FIG. 15 is an enlarged detail view of G circled in FIG. 14; FIG. 14 is a plan view corresponding to FIG. 13. FIG. 17 is a cross-sectional view taken along line HH in FIG. 16. FIG. 18 is a detailed enlarged view of I circled in FIG. 17; FIG. 14 is a diagram corresponding to FIG. 13. 20 is a sectional view taken along line JJ in FIG. 19. FIG. 21 is a detailed enlarged view of the portion circled in FIG. 20. FIG. FIG. 7 is a schematic perspective view of a disc-shaped cutter holder according to a modified example. FIG. 7 is a schematic perspective view of a disc-shaped cutter holder according to a modified example with hidden lines shown using broken lines.

One embodiment of a side milling cutter is described in more detail below with reference to FIGS. 1-21.

In a specific embodiment, the side milling cutter 100 is designed as a so-called mounted side milling cutter for end mounting on a rotary drive of a machining tool.

The side milling cutter 100 has a body 10, which is shown in particular in detail in FIGS. 4, 5 and 6, and a disc-shaped cutter holder 20, which is shown in particular in detail in FIGS. 7 to 10.

The main body 10 extends along a predetermined rotation axis R from a first end 11 to a free second end 12, as particularly shown in FIG. The first end 11 is formed with an interface for connection to a rotary drive. In a specific embodiment, in particular two recesses 13 are formed in the first end 11 to interact with a corresponding drive mechanism on the rotary drive for torque transmission.

At the free second end 12 of the main body 10, a seating surface 14 for supporting the disc-shaped cutter holder 20 is formed for supporting the disc-shaped cutter holder 20. In this embodiment, the seat surface 14 is formed by the flat end side of the annular configuration of the main body 10 and extends in a plane perpendicular to the axis of rotation R.

Starting from the second end 12 of the main body 10, a plurality of screw holes 15 are provided in the seat surface 14 to accommodate tightening screws 30 for fastening the disc-shaped cutter holder 20 to the main body 10. Although a total of four screw holes 15 and four tightening screws 30 are provided in the illustrated embodiment, the number of tightening screws 30 and screw holes 15 may be less than or greater than four.

A centering pin 16 is formed in the second end 12 of the body 10 and projects axially with respect to the seat surface 14, the function of which will be explained in more detail below. As can be seen in particular from FIGS. 3 and 5, the centering pin 16 has a cylindrical outer peripheral surface 16a.

As can be seen in particular from FIG. 5, a through hole 17 is formed in the main body 10 and extends along the rotation axis R from the second end 12 to the first end 11. The through hole 17 also extends in particular through the centering pin 16 and is open at the second end 12. The through hole 17 is configured to receive fastening means (not shown) by means of which the side milling cutter 100 can be fastened to a rotary drive via its interface provided at the first end 11. . The inner wall of the through-bore 17 is particularly of stepped construction and is provided with a shoulder 17a extending substantially perpendicular to the axis of rotation R and on which the fastening means can be supported in a sealing manner so that the side milling cutter 100 is fastened to the rotary drive device. The movement of the fastening means can here take place starting from the free second end 12 of the body 10 or from the side milling cutter 100.

The disc-shaped cutter holder 20 will be explained in more detail below. In particular, as shown in FIGS. 1 to 3, 7, and 8, the disc-shaped cutter holder 20 has a relatively thin disc shape having a first main surface 21 and a second main surface 22 parallel to the first main surface 21. are doing. In the assembled state of the side milling cutter 100, the first main surface 21 and the second main surface 22 each extend perpendicular to the rotation axis R. The first main surface 21 is formed to face the main body 10 and is configured to be supported by the seat surface 14 via an annular region. The annular region may for example preferably be in a planar configuration with the remainder of the first major surface 21 . However, regarding the annular region, it is also possible to have a stepped structure, especially as a protrusion, with respect to the remaining portion of the first main surface 21. The second main surface 22 is arranged to face away from the main body 10. The thickness of the disc-shaped cutter holder 20 and the axial height of the centering pin 16 are such that the centering pin 16 does not protrude toward the end when the side milling cutter 100 is assembled, as shown in FIGS. 1 and 2. , rather they are adapted to each other in such a way that they are substantially coplanar with the second major surface 22 of the cutter holder 20 .

As can be seen in particular from FIGS. 7 and 8, a through opening 23 is formed in the center of the cutter holder 20, passing through the cutter holder 20 from the second main surface 22 toward the first main surface 21. The through opening 23 extends coaxially with the rotation axis R and has an inner circumferential surface 23a that precisely matches the shape of the outer circumferential surface 16a of the centering pin 16. In this embodiment, the inner peripheral surface 23a has a hollow cylindrical shape. The inner circumferential surface 23a of the cutter holder 20 and the outer circumferential surface 16a of the centering pin 16 are adapted to each other such that they are sealed to each other relative to the coolant, as will be explained in more detail below. do.

A hole 24 is formed outside the through opening 23 in the radial direction, as shown in particular in FIGS. 7 and 8, for accommodating a tightening screw 30 in the cutter holder 20. In particular, as shown in FIG. 8, the hole 24 is beveled adjacent to the second major surface 22, so that in the installed state shown in FIGS. It does not protrude from the main surface 22.

The cutter holder 20 projects radially from the main body 10 and has an outer diameter substantially larger than the main body 10. A plurality of seats 25 for receiving replaceable cutter inserts 40 are arranged distributed over the circumference of the cutter holder 20, as shown in particular in FIG. Although in this embodiment a total of eight seats 25 are shown with cutter inserts 40 arranged thereon, it is also possible to provide fewer or more seats 25, for example. can. This number of seats can vary, depending in particular on the outer diameter of the cutter holder 20, for example. The seat portion 25 is configured such that a cutter insert 40 disposed thereon has a cutting edge 41 protruding from the cutter holder 20 in the radial direction.

In this embodiment, the seat 25 is arranged such that the cutting edges 41 of the cutter inserts 40 each project axially from the cutter holder 20 on both sides, i.e. beyond the second major surface 22, as shown in FIG. It is configured to project in the axial direction beyond the first main surface 21. The width of the cutting edge in the axial direction is between 1.5 mm and 12 mm, preferably between 2 mm and 10 mm. The thickness of the cutter holder 20, that is, the distance between the first main surface 21 and the second main surface 22, is somewhat smaller than the width of the cutting edge (for example, in the range of 1/10 of a millimeter), so that sufficient free movement is possible. Guaranteed.

The cutting edge 41 forms the most axially projecting region of the entire side milling cutter 100 at the second end 22 of the side milling cutter 100 .

The cutter insert 40, which in this embodiment is replaceable, is held on the seat 25 via elastically deflectable clamp fingers formed in the material of the cutter holder 20. A chip groove 26 is formed on the outer periphery of the cutter holder 20 adjacent to the seat portion 25, as particularly shown in FIGS. 7 and 8.

The side milling cutter 100 in this embodiment has an internal coolant supply structure for the purpose of supplying coolant to the area of the seat 25. The coolant supply structure is configured in such a way that a coolant outlet is provided, each assigned to the seat 25 or to the cutter insert 40 attached thereto. The configuration of the internal coolant supply structure will be described in more detail below.

First, the coolant distribution channel 50 formed in the disc-shaped cutter holder 20 will be described in detail with reference to FIGS. 7 to 10.

A plurality of individual coolant distribution channels 50 are formed in cutter holder 20 . In this embodiment, the number of coolant distribution channels 50 corresponds to the number of seats 25 of the replaceable cutter insert 40, so that each seat 25 is assigned an individual coolant distribution channel 50. There is.

In this embodiment, each coolant distribution channel 50 has an outlet opening 51 on the outer periphery of the cutter holder 20 through which the coolant escaping therefrom is directed to the seat 25 or located there. The area of the cutter insert 40 can be fed. In this example, the outlet openings 51 are each arranged in the deepest region of the chip groove 26, but other embodiments are also possible. For example, the outlet opening 51 may be located closer to the cutting surface of the respective cutter insert 40 or adjacent to the open surface of the respective cutter insert 40 . Although in the illustrated embodiment the coolant distribution channels 50 each have only one outlet opening 51, for example the coolant distribution channels 50 are branched, each having an outlet opening oriented, for example, in the direction of the cutting surface. It is also possible to have a plurality of outlet openings 51, such as an outlet opening 51 and an outlet opening directed towards the open surface.

The coolant distribution channels 50 in the cutter holder 20 each have a first channel section 52 running inside the cutter holder 20 towards an outlet opening 51, as shown in particular in FIG. The first channel portion 52 runs inside the cutter holder 20 so as to be closed by both the side surface of the first main surface 21 and the side surface of the second main surface 22 opposite thereto. The first channel portion 52 is preferably formed at least approximately in the center between the first main surface 21 and the second main surface 22 of the cutter holder 20.

As can be seen in particular from the detailed view of FIG. 10, which is an enlarged view of enclosing circle E of FIG. The coolant distribution channels 50 each have an inlet part 53 in the radially inner region of the cutter holder 20 , which inlet part 53 is open to the first main surface 21 and to the through opening 23 . Starting from the first main surface 21 of the cutter holder 20, the inlet portion 53 extends only over a part of the thickness of the cutter holder 20 in the region of the through opening 23, in particular in the area of the through opening 23 where the disc It extends over at most one third of the thickness of the shaped cutter holder 20. In other words, the axial height of the inlet portion 53 is at most one third of the thickness of the cutter holder 20 at the through opening 23. The entrance portion 53 can be formed, for example, by cutting starting from the first main surface 21 and the through opening 23.

As can be seen in particular from FIGS. 10 and 12, the inlet part 53 is connected to the first channel part 52 via its connecting part 54. The connecting part 54 can be constituted, for example, by a transverse hole starting in particular from the first main surface 21 , which transverse hole locates the inlet part 53 opening into the first main surface 21 inside the cutter holder 20 . The first channel section 52 is connected to the first channel section 52. Since the connecting portion 54 is closed to the second main surface 22 and in the direction of the through opening 23, the inner circumferential surface 23a that seals against the outer circumferential surface 16a of the centering protrusion 16 is the same as the thickness of the cutter holder 20. extends over at least two-thirds of the area of the inlet section 53. These features can also be seen in particular in the cross-sectional view in the region of the inlet section 53 in FIG.

Similarly, as shown in FIGS. 10 and 12, a recess 55 is formed between each adjacent inlet portion 53 of adjacent coolant distribution channels 50, contacting the first major surface 21 and the through opening 23. However, its functionality will still be explained in detail. In this embodiment, the recesses 55 are formed by chamfers or slopes connecting adjacent inlet portions 53, respectively. In this way, the recess 55 can be produced particularly simply by circumferential chamfering before and after the formation of the inlet 53. In the thickness direction of the cutter holder 20 , the recess 55 also extends over a maximum of 1/3 of the thickness of the cutter holder 20 in the area of the through opening 23 , so that the sealing inner circumferential surface 23 a also extends over the thickness of the cutter holder 20 . extends in the area of the recess 55 over at least two-thirds of the area.

A plurality of coolant supply channels 60 are formed in the main body 10, the structure of which will be described in detail below with reference to FIGS. 4, 5, and 6. Although a total of eight coolant supply channels 60 are shown in this example, corresponding to the number of coolant distribution channels 50 in cutter holder 20, the number of coolant supply channels 60 can also be greater than eight. It may be less and in particular need not correspond to the number of coolant distribution channels 50 or the number of seats 25 on the cutter holder 20.

As shown in particular in FIG. 5, in the exemplary embodiment shown, the coolant supply channel 60 branches off starting from the through hole 17, through which the coolant is supplied starting from the side of the rotary drive. As shown in particular in FIGS. 4 and 5, the coolant supply channel 60 opens into the second end of the body 10 radially outwardly of the centering pin 16 and radially inwardly at the location of the screw hole 15. The openings of the coolant supply channel 60 are here arranged annularly over the outer circumference of the centering pin 16 , ie the openings are arranged in an annularly extending region around the centering pin 16 .

In the annular region into which the coolant supply channel 60 opens, a groove 61 deeper than the seat surface 14 is formed circumferentially around the centering pin 16, as shown in particular in FIGS. 4 and 6. In this embodiment, the groove 61 is configured as a hollow which deepens on the seat surface 14 in the direction of the centering pin 16, ie radially inward, which allows for particularly simple manufacture. However, other shapes of the annular circumferential groove 61 are also possible.

As also best shown in FIG. 6, a circumferential recess 62 is formed in the centering pin 16 in the area between the outer circumferential surface 16a and the annular groove 61 formed in the seat surface 14. The circumference of is locally reduced in this region. In other words, this circumferential recess 62 forms an annular recess on the area of the centering pin 16 adjacent to the seat surface 14 .

The interaction between the main body 10 and the cutter holder 20 that forms the internal coolant supply structure will be described below with reference to FIGS. 13 to 21.

When the cutter holder 20 is fastened to the main body 10, the region of the first main surface 21 of the cutter holder 20 contacts the seat surface 14 of the main body 10, and the outer circumferential surface 16a of the centering pin 16 is inside the through opening 23. It closely contacts the peripheral surface 23a. As can be seen by combining the figures, FIGS. 15, 18, and 21 are cross-sectional views of a plane including the rotation axis R, and show detailed views of sections at different points in the circumferential direction. FIG. 15 is a partially detailed cross-sectional view of a region where the coolant supply channel 60 is not open and where the inlet portion 53 of the coolant distribution channel 50 is not present. FIG. 18 shows a detailed view of the section in the area in which the inlet part 53 of the coolant distribution channel 50 is located. FIG. 21 is a detailed cross-sectional view of the area in which the coolant supply channels 60 are open.

As can be seen in FIGS. 15, 18 and 21, the coolant distribution chamber 70 is formed in the area between the body 10 and the cutter holder 20. The coolant distribution chamber 70 is formed by the interaction of the annular groove 61 in the seat surface 14, the circumferential recess 62 of the centering pin 16, and the recess 55 of the cutter holder 20. This common coolant distribution chamber 70 thus extends annularly around the axis of rotation R or centering pin 16 . The common coolant distribution chamber 70 then has a cutter holder side portion formed by the recess 55 on the cutter holder 20 . A groove 61 deepened relative to the seating surface 14 forms a first body-side portion of a common coolant distribution chamber 70 . The circumferential recess 62 of the centering pin 16 forms a second body side portion of a common coolant distribution chamber 70 .

As shown in FIG. 21, the coolant supply channels 60 open into a common coolant distribution chamber 70 formed in this region by recesses 62, grooves 61 and recesses 55, respectively. As shown in FIG. 15, the coolant can then be distributed circumferentially via the coolant distribution chamber 70. In the area where the inlet portion 53 of each coolant distribution channel 50 is located, coolant can then enter the respective coolant distribution channel 50 from the common coolant distribution chamber 70, as shown in FIG.

During operation of the side milling cutter 100, coolant is supplied from the first end 11 of the body 10 through the through holes 17 into the coolant supply channels 60. The axial end-side outflow of the coolant at the second end 12 via the through-holes 17 is carried out via internally received fastening means (not shown) for the body on the rotary drive. Prevented. Via the coolant supply channel 60, the coolant is supplied to a common coolant distribution chamber 70 and distributed circumferentially via the latter to the respective coolant distribution channel 50. The end-side outflow of the coolant at the second end 12 between the centering pin 16 and the through opening 23 occurs when the inner circumferential surface 23a of the through opening 23 is relative to the corresponding outer circumferential surface 16a of the centering pin 16. This can be prevented by sealing. Via the coolant distribution channels 50 in the cutter holder 20, the coolant is delivered in a targeted manner into the area of the respective seat 25.

Due to the annular configuration of the common coolant distribution chamber 70 and the fact that this distribution chamber is arranged radially inside the screw hole 15 and the tightening screw 30, the through opening 23 of the inlet part 53 of the coolant distribution channel 50 The circumferential distribution of is independent of the number and distribution of the openings of the coolant supply channels 60 on the circumference of the centering pin 16. In this way, a plurality of cutter holders 20 can be used on the same body 10, which cutter holders 20 differ from each other, for example in terms of their outer diameter and/or the number of seats 25 and coolant distribution channels 50. ing.

22 and 23 show a modification of the cutter holder that can be similarly used in the main body 10 described above.

As can be seen in FIGS. 22 and 23, the cutter holder 20' according to the variant has a greater number of seats 25 with cutter inserts 40 fastened thereto and a correspondingly greater number of coolant distribution channels 50. The cutter holder 20 is different from the cutter holder 20 described above in that it has the following. Since the cutter holder 20' does not otherwise differ from the cutter holder 20 described above, the same reference numerals will be used and detailed descriptions of the individual features of the cutter holder will not be repeated.

Due to the annular configuration of the common coolant distribution chamber 70, the cutter holder 20' according to this variant can be easily used in the body 10 to ensure that the cutter insert 40 is supplied with coolant.

Although an embodiment has been described in which the common coolant distribution chamber 70 has both a cutter holder side (recess 55) and a first body side (groove 61) and a second body side (recess 62), this embodiment Although the examples allow for particularly satisfactory coolant distribution and at the same time simple manufacture, it is also possible, for example, to provide only one or the other of these, or only one of these. In this case too, the coolant can also be distributed circumferentially.

Claims (16)

a disc-shaped cutter holder extending along a predetermined axis of rotation (R) from a first end (11) with an interface for connection to a rotational drive mechanism towards a free second end (12); (20); a main body (10) in which a seat surface (14) is formed;
It is fastened to the second end (12) and supported by the seat surface (14) with a first main surface (21) facing the main body (10), and the outer periphery of the seat surface (14) is radially shaped. a disc-shaped cutter holder (20) having a central through opening (23) projecting from the main body (10) and penetrating in the axial direction;
In a side milling cutter (100) comprising:
The body (10) is formed with a plurality of coolant supply channels (60) for supplying coolant to the second end (12) of the body (10) and the disc-shaped cutter holder (20). A plurality of coolant distribution channels (50) are formed in the body ( 10) and the disc-shaped cutter holder (20), branching from a common coolant distribution chamber (70; 55, 61, 62); at least two channels of the plurality of coolant supply channels (60) are open to the
Side milling cutter. Side milling cutter according to claim 1, wherein the common coolant distribution chamber (70; 55, 61, 62) extends annularly about the axis of rotation (R). each of the coolant distribution channels (50) having a first channel portion (52) running inside the cutter holder (20);
The first channel portion (52) has a side surface of the first main surface (21) of the cutter holder (20) and a side surface of the second main surface (22) opposite to the first main surface (21). formed by being closed with
the cutter holder (20) has at least one outlet opening (51) on the outer periphery thereof, and is open toward the through opening (23) and the first main surface (21); having an inlet part (53) extending only over a part of the thickness of said cutter holder (20) in the area of the part (23);
A side milling cutter according to claim 1 or 2. Said coolant distribution channels (50) each have a connection (54) connecting said inlet portion (53) to said first channel portion (52), said connection portion (54) connecting said through-opening ( 4. Side milling cutter according to claim 3, in a closed arrangement in the direction of 23) and with respect to the second main surface (22). The axial height of the inlet portion (53) that opens toward the through opening (23) is at most the thickness of the disc-shaped cutter holder (20) at the through opening (23). Side milling cutter according to claim 3 or 4, which is one-third. The disc-shaped cutter holder side portion of said coolant distribution chamber (70; 55, 61, 62) is adjacent to the first main surface (21) and the through opening (23) and is located in said coolant distribution channel ( Side milling cutter according to any one of claims 3 to 5, formed by a recess (55) in the disc-shaped cutter holder (20) extending between respective inlet portions (53) of the side milling cutter (50). . The axial height of the cutter holder portion of the coolant distribution chamber (70; 55, 61, 62) is at most a third of the thickness of the disc-shaped cutter holder (20) at the through opening (23). 7. The side milling cutter according to claim 6, wherein the side milling cutter is 1. a through opening in the cutter holder (20) having a centering pin (16) disposed at the second end (12) of the body (10) and projecting axially from the seat surface (14); Side milling cutter according to any one of the preceding claims, characterized in that the section (23) is adapted to the outer contour of the centering pin (16). Side milling cutter according to claim 8, comprising a through hole (17) passing through the centering pin (16) and opening into the second end (12). The side milling cutter according to claim 8 or 9, wherein the inner circumferential surface (23a) of the through opening (23) of the cutter holder (20) closely contacts the outer circumferential surface (16a) of the centering pin (16). . 9. The plurality of coolant supply channels (60) open radially into the common coolant distribution chamber (70; 55, 61, 62) radially outside the centering pin (16). 10. The side milling cutter according to any one of items 10 to 10. Said coolant distribution chamber (70; 55, 61, 62) is formed by a first groove (61) formed around said centering pin (16) and recessed relative to said seating surface (14). Side milling cutter according to any one of claims 8 to 11, having a body side part. Claim 8, wherein the coolant distribution chamber (70; 55, 61, 62) has a second body-side part formed by a circumferential recess (62) formed by the centering pin (16). The side milling cutter according to any one of items 12 to 12. 14. According to any one of claims 1 to 13, comprising a plurality of seats (25) distributed over the circumference of the disc-shaped cutter holder (20) for receiving replaceable cutter inserts (40). Side milling cutter as listed. Side according to claim 14, wherein the seat (25) is configured to receive a replaceable cutter insert (40) projecting axially from the disc-shaped cutter holder (20) on each side. milling cutter. or claim 14, comprising a plurality of replaceable cutter inserts (40) fastened to the seat (25) and forming the area of the side milling cutter that projects axially furthest from the body (10). 15. The side milling cutter according to item 15.

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